Vernier height gauge



April 4, 1944. J. BARDEGA VERNIER'HEIGHT GAUGE Filed Oct. 29., 1943 2 Sheets-Sheet l INVENTOR. b5/51% 5550559.

April 4, 1944. J. BARDEGA VERNIER HEIGHT GAUGE 2 Sheets-Sheet 2 Filed Oct. 29,V 1945 INVENTOR. l JbEEFH 5550555 Patented Apr. 4, 1944 UNITED I STATES PATENT OFFICE VERNIER. HEIGHT GAUGE Joseph Bardega, Detroit, Mich. 7 Application October 29, 1943, Serial No.' 508,209

` 3 claims. (ci. 33 170) The purpose of my improvement is to provide a height gauge in which Vernier calibrations are s spaced from each other to such an extent that exact measurements of minute units of length may be easily read and distinguished. Specifi- I have accomplished these purposes by novell means and by a novel combination of parts. Iv

shall now describe my said gauge with reference to the accompanying drawings in which,

Fig. 1 is the front elevation of my gauge;

Fig. 2 is a rear View, partly in section, of a sliding head and a clamp, both being vital elements of my gauge, and a fragmentary rear elevation of the beam on which said clamp and said headare mounted;

Fig. 3 is a sectional view of my gauge, taken on line 3-3 of Fig. 1;

Fig. 4 is a fragmentary plan view of a member shown in Fig. 2;

Fig. 5 is a sectional view of the above said sliding head, taken on line 5-5 of Fig. 2;

Fig. 6 is a rear elevation of the sliding head,l

as in Fig. 2, but showing a diiferent relative position of its working parts;

Fig. 7 is an enlarged View of a detail shown in Fig. 2l; p

Fig. 8 is a side elevation of a member, being a part of a mechanism, contained in the sliding head of my gauge;

Fig. 9 is a diagram illustrating the theoretical basis of my gauge. Fig. l0 is,V a modilied detail of view shown in Fig. 5. i

Similar numerals refer tol similar parts throughout the several views.

The gauge of my construction comprises an upright beam I0, rising from a base II. The beam is made in the shape of a flat bar, substantially rectangularin form, and is provided with calibrations I2. These may be of the standard type, each representing the distance of $40 part oi. an inch, though obviously any other division may be adapted if desirable. A head I3, which may be sldingly moved up and down, respectively, on said beam, contains a rectangular frameL or` window I4, and a pointer beam. An arm I6, laterally jutting out of the be secured to the arm by means of a yoke I 6 III and a knurled adjusting screw I9.

Spaced from the head and also in a sliding relation to the beam is a clamp 20, equipped with a friction plate 22, bearing against the side of beam I0, and a knurled screw 2| to bear against said plate. At the opposite end, said clamp is connected with head I3 by means of a bar 23, the upper end of which is seated within a rectangular slot 24. An adjusting screw 25, having a knurled head 26 projecting above the upper surface of the clamp, is threaded into the upper end of said bar 23, and has a collar 2'I, which prevents a longitudinal movement of the screw with respect to the clamp. A longitudinal slot 28 in the side of the upper end of said bar 23 and a screw 29 which extends into said slot,

l prevent the bar from being entirely withdrawn from slot 24 but allows within certain limits, longitudinal movement of the bar with respect to the above said clamp.

By means' of the arrangement of parts already described, it is possible to obtain measurements within the capacity of the calibrations appearing on beam I 0. No explanation how this may be accomplished, is needed, as the function of each part thus far described, is quite obvious. I shall nevertheless allude thereto in connection with the description of my provisions for Vernier measurements. I am using for this purpose a separate sliding ruler 30, marked with calibrations 3I, and fitting into a rectangular recess in beam IIJ, so that the face of the ruler is flush with the face of the beam. Approximately midway its length, the ruler is integrally connected to a laterally extending block 33. The block is disposed Within a hollowed out space 36 in head I3, between beam I0 and plate 46. Screw 4l serves to keep plate 46 in a sliding contact with the block which may be moved up and down within head I3 by means of a screw 34, having a head 35, and passing through a threaded hole in the block parallel to beam I6. On the opposite side of the beam but on the same side of head I3, said head contains a recess 3l to accommodate an expanded portion 38 of bar 23. Said portion 38 contains a substantially circular socket 39 with an oblong opening 46 in its bottom. A pin set in the above said head IIJ, as shown in Fig. 5, passes through said opening 46 into socket 39. Assuming that I5, z directedtowards the; calibrations on the f clamp 20 is secured against longitudinal move opposite the pointer I5.

ment with respect to the beam, it is possible to move head I3, by means of said pin 4I with respect to bar 23 which is stationary. In order to allow the movement of head I3 with respect to the expanded portion 38 of bar 23, recess 31 is slightly spaced from portion 38, both at the top and at the bottom thereof.

Located within the socket is a disk 42, having an off-center transverse bore to t over pin 4I, the disk being kept in place on said pinby means of a nutt. arm t3, extendsfradially from said disk across beam It and terminates within a rectangular aperture in a circular plate ,44, which rotates freely in a correspondingly shaped depression in the surface of block tffTherend of arm t3 within plate it is in a sliding contact with the walls of the rectangularfaperture as the extent oi its penetration :into said :aperture may vary with the up and down movement of the block in which the plate is loca-ted. "Said end ofarm G3 is splitand yprovided with a tapered screw 545i in order thatithe split parts may, be expanded'to preventfany Vlooseness-.of Contact between said endand the aperture .in which it is seated. As shownin lO, a modiedpin, 59, may also be split and provided with atapered screw 50 for expansion ofthe split parts. Similarly disk 42 may also besplit.

The gauge is used in theiollowing manner: After screw 2| in clamp ilhas beenloosened, head I3, including arm -IG and scriber I'I, is. adjusted manually on beam IQ as-closelyas it .can be done, to indicate the height of a-given'object. The specific height will be indicated by pointer 5 on scale I2. As head I3 of which the pointer is a part, is connected to bar 23, and the latter may be raised or lowered by means or" screw 25 having a knurled head'26, itis possible to raise or to lower the head by means of said screw so that the pointer will coincide exactly with a respec. tive calibration on beam Ill. In order to secure more accurate reading tothe fraction ofthe unit which is used in calibration I2 on beam' I0, I am employing the slide Vruler '36. The ruler shows a number of equal divisions. beginning atzero and going up andk down, respectively. As the ruler is connectedto block 33, and the latter is located WithinV head'IS which' includes pointer I, the sliding ruler may be marked so thatthe zero calibration thereon Will"be normally set "Thismeans that `no mattei' which line of-'division on'calibration I2, pointer I5 indicates, the initial notation onV ruler 3E will be zero. To obtain Vernier readings on ruler 3,-theknurled head 35 of screw 34 is turned manually. This, letus assumeforthe sake of illustration, will cause block 33 to `move upwardly. Arm ftwill be therebyswung 'upwardly and disk :i2 will turn around pin ISI in a` clock-#wise direction in socket v This is shown in AFig. 6. As bar 23 including its expanded portion-38, is fixed and said disk .42! is -eccentricto an extent which will be indicated here-nafterfthe turning of disk :i2 will cause pinlII toshift upwardly. As thepin is. afiixed to head .13, it is the whole head that will be so shifted withthe pin.

It will `be seenthat. arm liiis a fewf times i longerthanzthe radius of disknliZ. ',By reason will represent minute distances on the periphery of disk 42. This is shown in Fig. 9 wherein the tangential line c-y, corresponds to my sliding ruler 30 and radius a corresponds to arm 43, while circle g corresponds to disk 42. Distances c-:1:I, .rlm2, etc., are all even and each is intended to represent an equal fraction of the measuring unit used in scale I2 on beam I0. Obviously corresponding distances on the arc of the larger circle, that is distances c-dI, all-d2, etc., arefnot-equal to each other', but the whole of said arc from c to d5, has its counterpart in arc e--f of the smaller circle g. It will be rel'membered that disk 42 in my gauge is slightly -eccentric.-' Here is the purpose and the reason thereof. If calibrations on line c-y are to represena-say,v 1/iooo of an inch, the smaller circle which represents disk 42, must be made eccentric so that each successive radius corresponding to thel radius in the larger circle intersecting a respective calibration onr liner c-y, .must be v1/1000 of an inchlonger. In theodrawings inFig. Y9, radius -0-f,Z would lbe, 5h00@ oan inch longer than radius O-e.A In my gauge the eccentric periphery e-f,Z, would have its counterpart on the lower side of disk .'42 so that radius 0-;c, would coincide with the perpendiculardi'amet'er ofthe disk or line .-z in circle g, respectively. Another such eccentric periphery of the same arcuate ldimension isv diametrically opposed on the upper side of disk'42.

In practical application, the sliding ruler of. my

y gauge has 25 equal calibrations, counting upfrom Y3l] may beU adapted if preferred. ",The"main point is, however, that Ydistancesbetweenfcalibrations on the Vernier sliding'ruler30', may be made suitably large and "that" because of that, they may be read easily.

I Wish to add that a complete turn of screw 35 Y will move block 33` to a distance of onev calibration on ruler-*30. `VIt is 'therefore"theoretically possibleto subdivide'the circumference of said lscrew into tenequal` parts and to obtain a reading to 1-6 ruler 30.

It is obvious that some changes may' be made in theV construction of my gauge and that it may be applied to other measuring-V instruments such as calipers, microrrieters,` etc., 'theinventive 'prinof the -Vernier' calibration showncn ciple disclosed `herein being-made a part of'such brations, a vertically sliding head on saidbeam,

including a pointer directed -at said calibrations and a lateral arm adapted to support a scriber, a sliding.v clamp on `said beam, spaced fromsaid head, a member connecting the head to the clamp,

means, .to adjust the spacing. betweenthem, fsaid member shaving. an expanded-portion within'- a ,recess inthe head and provided with a circular zsocket therein, a Vernier ruler'slidingly.abutting the calibrated sdeof the beam, aldsk'ltting into said circular socket and' having an eccentric bore, a pin connected to said head and passing through said bore, an arm extending radially from said `disk to the sliding ruler and screw means to vertically move said sliding ruler and to vertically shiftsaid head by means of said pin seated in the eccentric bore of said disk.

2. In a height gauge of the kind described an upright beam, having one side provided with calibrations, a vertically sliding head on said beam, including a pointer directed at said calibrations, and a laterally extending arm, adapted to support height marking means, said head having a recess therein, a, vertically sliding clamp on said beam above said head and spaced therefrom, a member parallel to the beam connecting the clamp with the head, screw means to adjust spacing between them, said member having an expanded portion disposed within said recess and containing a circular socket, a disk fitting into said socket and having an eccentric bore, a pin axed to said head and passing through said bore, a sliding Vernier ruler abutting the calibrated side of the beam and having a lateral block, an arm at one end pivotally located within said block and at the other end connected radially to said disk, and screw means to vertically move said block and ruler to swing the disk, and to vertically shift the head by means of said pin.

3. A height gauge of the kind described'having an upright beam calibrated along its edge, a sliding head on said beam with a pointer directed at said calibrations, a clamp above said head adapted to slide on said beam, an adjustable member member extending from the clamp to the head and having a circular socket opposite the body of said head, a disk with an eccentric bore fitting into said socket, a pin projecting from the head through said bore, a sliding Vernier ruler abutting the calibrated side of the beam, an arm radially extending from the disk to the sliding ruler, and screw means to vertically move the ruler causing by means of said arm to swing the disk and to vertically shift the sliding head by means of said pin.

JOSEPH BARDEGA. 

